MESON Chess Problem Database

Problem Display
PID: 180446 (8/QNPP4/NKP5/RB1p1R2/8/1p2kPp1/6P1/4B3 w - - 0 1)

Lider, Valentin Viktorovich

Mat, 1975

8/QNPP4/NKP5/RB1p1R2/8/1p2kPp1/6P1/4B3

#2

13 + 4

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Tries
    • 1.Bf1?
      • 1...Kd4
        • 2.Kb5#
      • 1...d4
        • 2.Rae5#
      • 1...b2!
    • 1.Ra3?
      • 1...Kd4
        • 2.Ka5#
      • 1...d4!
    • 1.Rxd5?
      • 1...Kf4
        • 2.Bd2#
      • 1...b2!
    • 1.c8Q?
      • 1...Kd4
        • 2.Kc7#
      • 1...d4
        • 2.Qe8#
      • 1...b2!
    • 1.c8R?
      • 1...Kd4
        • 2.Kc7#
      • 1...d4
        • 2.Re8#
      • 1...b2!
  • Keys
    • 1.Sb4!
      • 1...Kd4
        • 2.Ka6#
      • 1...b2
        • 2.Sc2#
      • 1...d4
        • 2.Sd5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • B(E);
      • Vars
        • K(b);S_FLIGHT::QAB(J)+K(H)
        • P(d);OGATE,SBLOCK::R(D)
      • Refutation
        • P(a);
    • Try
      • R(D);P_PINP(a)
      • Vars
        • K(b);N_SPINP(a),S_FLIGHT::QAB(J)+K(H)
      • Refutation
        • P(d);
    • Try
      • R(F);XP(d)
      • Vars
        • K(b);S_FLIGHT::B(A)
      • Refutation
        • P(a);
    • Try
      • P(L);
      • Vars
        • K(b);S_FLIGHT::QAB(J)+K(H)
        • P(d);SBLOCK::QAR(L)
      • Refutation
        • P(a);
    • Try
      • P(L);
      • Vars
        • K(b);S_FLIGHT::QAB(J)+K(H)
        • P(d);SBLOCK::R(L)
      • Refutation
        • P(a);
  • Actual
    • S(G);
    • Vars
      • K(b);S_FLIGHT::QAB(J)+K(H)
      • P(a);N_GUARD::S(G)
      • P(d);SBLOCK::S(G)
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